US4417932A - Process for the continuous production of a length of stratifield material from foam particles - Google Patents

Process for the continuous production of a length of stratifield material from foam particles Download PDF

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Publication number
US4417932A
US4417932A US06/305,726 US30572681A US4417932A US 4417932 A US4417932 A US 4417932A US 30572681 A US30572681 A US 30572681A US 4417932 A US4417932 A US 4417932A
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United States
Prior art keywords
foam particles
process according
particles
sheet
foam
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Expired - Fee Related
Application number
US06/305,726
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English (en)
Inventor
Hans-Ulrich Breitscheidel
Paul Spielau
Franz-Werner Alfter
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Dynamit Nobel AG
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Dynamit Nobel AG
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Assigned to DYNAMIT NOBEL reassignment DYNAMIT NOBEL ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ALFTER, FRANZ-WERNER, SPIELAU, PAUL, BREITSCHEIDEL, HANS-ULRICH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/30—Expanding the moulding material between endless belts or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3461—Making or treating expandable particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0036—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting of large particles, e.g. beads, granules, pellets, flakes, slices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y10T428/24901—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material including coloring matter

Definitions

  • the invention relates to a process for the continuous production of a length of stratified material from foam particles which particles, by supplying heat thereto, are at least superficially heated and by application of pressure are bonded to form a shaped component of the desired thickness and density and then cooled.
  • An apparatus for conducting the process starts with a metering device for the foam particles, a heating device, and a sizing device with cooler unit formed between two mutually opposed, endlessly revolving belts.
  • German Pat. No. 1,629,321 discloses a process and apparatus for the continuous manufacture of foamed lengths of material from fully expanded synthetic resin beads, especially polystyrene.
  • the foamed beads are subjected to controlled heating by hot air under atmospheric pressure to obtain a coherent, practically as yet unshaped mass and then the mass is first compressed to its final shape while maintaining the temperature and thereafter cooled off while maintaining the pressure.
  • the heating of the beads with hot air takes place at temperatures of between 103° and 130° C.
  • German Pat. No. 2,622,777 describes a process for the continuous production of a length of laminated material from elastic foam particles wherein the foam particles are glued to an existing layer of material by heating the layer and wherein, by subsequent heating of the glued-on foam particles on their surfaces until they become tacky, another layer of foam particles can be applied thereto and pressed thereagainst. This process makes it possible to manufacture sheeting of foam particles also in the sandwich construction with outside or interposed intermediate layers made from other materials.
  • This object has been attained according to the invention by scattering foam particles onto a conveying zone and preheating these particles during their conveyance superficially to a temperature in the range from 100° to 160° C.; thereafter feeding the preheated foam particles to a free fall zone and heating them, during falling, superficially further to a temperature of 200° C. and thereabove, and piling them up at the end of the free fall and precompressing them into sheeting, whereafter the precompressed sheeting is sized, i.e., calibrated while simultaneously a cooling operation is conducted.
  • the process of this invention makes it possible to process foam particles requiring relatively high temperatures for heating same and for converting their surface into a plastic and thus tacky and/or weldable condition, into macerate (i.e., pressed particle) sheeting of relatively large thicknesses in one operating step.
  • One essential idea of the invention is to be seen in that the heating of the foam particles takes place in two stages without the use of excess pressure, i.e., under atmospheric pressure. In the first preheating stage, when the foam particles have not as yet become too tacky on their surface by the heating process, the heating step is carried out while effecting a transporting operation by means of a conveyor belt.
  • the heating process is performed in free fall, i.e., there is no danger that the thus greatly heated particles will undesirably stick to a substrate.
  • the foam particles, heated until they are bonded together, are then piled up to the desired height for the subsequent thickness of the sheeting to be manufactured; this is controlled by the velocity of a conveyor belt collecting the foam particles, and the particles are then compressed to the desired sheeting in two stages.
  • a pressure of 0.1-1 kp/cm 2 is utilized for the preliminary compacting of the foam particles, this value being dependent on the thickness of the sheeting to be manufactured as well as on the desired degree of compacting. Similar considerations apply with respect to the pressure to be used during sizing operation, this pressure ranging preferably between 0.2 and 5.0 kp/cm 2 , whereby the pressure in the sizing operation is always higher than in the preliminary compacting step.
  • Foam particles of differing density, size, color, and composition of the same or a different synthetic resin can be employed for the process of this invention. It is also possible to include, besides the foam particles, fillers and/or binders such as, for example, textile particles and textile fibers, as well as textile fabric shreds or the like, synthetic resin scrap in comminuted form.
  • Foam particles of polyolefin foam materials, especially crosslinked polyolefin foam materials can be used especially advantageously; these materials require relatively high temperatures until the materials are converted into an adhesive or weldable condition on their surfaces but thereafter result in durable and more or less compact chips sheeting, depending on the pressures applied and the chip qualities employed.
  • the process of this invention can be used advantageously in all those cases where large amounts of shreds, scrap, edge cuttings, etc. are produced in the processing of foam materials, which amounts can be press-molded into sheet-like laminated materials by the process of this invention.
  • the thus-produced macerate sheets are of a porous character and can be utilized, for example, as drainage panels or in a variegated fashion for insulation purposes in the construction field and in underground civil engineering applications. They are also suitable as protective mats, for example, on house walls, on roofs with walkways, etc. Depending on the field of usage of the thus-produced sheeting, it can be more or less permeable and, by lamination to appropriate cover layers, can be adapted to still further fields of usage. It is also possible to provide the thus-manufactured sheeting with a surface profile and/or to produce profiled rods; this is dependent exclusively on the corresponding shaping step by the sizing procedure, i.e., by the sizing device.
  • An especially advantageous embodiment of the process of this invention provides that the foam particles are scattered on at least two conveying zones or paths which are controllable mutually independently with respect to their conveying speed, and are fed to a joint falling zone.
  • the utilization of two heatable conveying zones has the advantage that the capacity of the plant can be increased, on the one hand, and, on the other hand, the joining of the preheated foam particles in a combined falling zone results in an improved intermixing of the particles.
  • Another essential aspect, however, is to be seen in that with the use of foam particles of differing properties and thus also of differing heating-up times, the conveyor belts can be correspondingly differently controlled.
  • Foam particles having a higher weight per unit volume require a longer time period to be heated to a specific temperature than foam particles having a lower weight per unit volume, for example, those of polyolefin foam materials.
  • foam particles having varying weights per unit volume it is now possible to drive the conveyor belt carrying foam particles having the higher weights per unit volume at a lower speed so that at the end of this conveyor belt, also these foam particles have reached the desired temperature; whereas the conveyor belt carrying the foam particles with the lower weight per unit volume can be operated at a higher velocity. Yet, a uniform product is obtained at the end of the process.
  • the finished layer thickness of the thus-produced sheeting is dependent on the piled-up height of the heated foam particles and on the subsequently applied pressures with the resultant compressions.
  • the height of the layer thickness of the piled-up, heated foam particles is determined by the conveyor belt collecting the foam particles at the end of the falling zone.
  • the precompressed sheet is fed to a sizing zone which, during sizing, also takes over the cooling of the sheet.
  • cooling is preferably performed directly with water, which flows through the sizing zone and through the porous, pressed macerate sheeting and, if desired, is collected and recycled; whereas air cooling is performed in the final section of the sizing zone, during which stage the sheeting is simultaneously dried.
  • the finished sized and pressed sheeting which is profiled in accordance with the design of the sizing belts, is thereafter edge-trimmed and cut conventionally into any desired formats.
  • An apparatus for conducting the process of this invention is advantageously equipped so that at least one endlessly rotating conveyor belt is provided with an associated heating unit which leads to a falling chute provided on its inner walls with heating units, these units being followed by a conveyor belt with a compacting device arranged thereafter.
  • a preferred construction of the apparatus according to the invention provides that two endlessly rotating conveyor belts are present which have velocities controllable independently of each other. In this way, a rapid, uniform preheating of the foam particles is ensured and at the same time the completely heated foam particles are more uniformly intermixed and more uniformly spread onto the conveyor belt leading to the compacting stage.
  • An advantageous arrangement of the apparatus provides that the conveyor belts are arranged in superposition, namely, so that the belts constitute, preferably above the sizing device, practically a three-tier construction.
  • the conveyor belts can be arranged slightly inclined from the horizontal, entering at the falling chute (well) in maximally close superposition; whereas the belts diverge in a scissor-like fashion at the feed ends. This has the advantage that the feeding devices for the foam particles can be arranged at that location.
  • the heated foam particles become tacky, it is advantageous to construct all belts coming in contact with the heated foam particles as "Teflon” (polytetrafluoroethylene) belts, for example, and also to arrange stripper means for any adhering foam particles.
  • Teflon polytetrafluoroethylene
  • the FIGURE illustrates schematically the process of this invention and an apparatus according to this invention for conducting the process. It is possible by means of the process and apparatus to manufacture continuously endless sheets or profiled sheeting from foam particles, i.e. fully expanded foam particles, granules, chips, edge trimmings, etc., these sheets being fashioned to be more or less air-permeable, depending on the qualities of the foam particles utilized and on the degree of compacting. Sheets have a thickness of up to 100 mm and more can be manufactured with the process and apparatus of this invention.
  • the foam particles are conveyed via conveying means, not illustrated, to the metering hoppers 1, 3; see arrows 11, 12.
  • the metering hoppers can optionally be equipped with a vibrator 2, 4.
  • Scattering rolls 9, 10 are arranged at the outlet end of the metering hoppers 1, 3, so that by changing the number of revolutions of the scattering rolls the dose of foam particles, i.e. the amount of foam particles introduced onto the subsequently arranged conveyor belts 5, 6, can be controlled.
  • the endlessly rotating conveyor belts 5, 6 are provided for the transportation and simultaneous heating of the foam particles in the first heating stage superficially to temperatures of between 100° and 160° C.
  • the conveyor belts are preferably made of a "Teflon" fabric to prevent sticking of the foam particles.
  • the speed of conveyor belts 5, 6 can be separately controlled so that the residence times of the foam particles and thus the heating times can be regulated in accordance with requirements of the product.
  • the arrows 25, 26 show the rotating direction of the upper conveying surfaces of conveyor belts 5, 6.
  • Heating units 7, 8, for example IR radiators, are arranged above the conveyor belts. The spacing of the radiators with respect to each other and with respect to the conveyor belts is adjustable.
  • the conveyor belts 5, 6 run to the falling chute 15.
  • the belts are slightly inclined from the horizontal so that they diverge scissor-like at the beginning so that the feeding means for the foam particles can be located at that location.
  • the conveyor belts 5, 6 are equipped with heat shields 13, 14 in the zone of the free-fall chute and in the zones where they are in close mutual proximity, so that the rotating belts 5, 6 are protected in the endangered regions against the rearward radiation of the heaters 7, 8.
  • the heat shields are furthermore equipped with stripping means, not shown in detail, for adhering foam particles.
  • the chute which is preferably constructed to be laterally closed off, for example in a rectangular shape or also in a different circular configuration, is equipped along the inside walls with heating devices 16, for example IR radiators.
  • heating devices 16 for example IR radiators.
  • the rotating conveyor belt 17 is arranged, which is likewise a "Teflon" belt and the conveying surface rotates in the direction of arrow 27.
  • the velocity of this conveyor belt which also exerts a collecting function for the heated foam particles dropped thereon, can be regulated. Depending on the velocity, a certain height of the piled-on foam particles results, the finished thickness of the sheeting to be produced being dependent on this height.
  • the heated foam particles piled upon the conveyor belt 17 are then subjected, at the end of conveyor belt 17, to a preliminary compacting step by means of the roll 18.
  • the nip between roll 18 and conveyor belt 17 is adjustable, depending on the desired thickness of the sheeting to be manufactured. For example the size of the nip may be between 40 and 60% of the height of the piled-on foam particles.
  • the preliminarily compacted sheet then enters directly into a sizing and cooling zone wherein the sizing zone 21 is constituted by the two endlessly rotating chain belts 19, 20, having opposing surfaces rotating in the direction of arrows 28, 29.
  • the speed of the belts 19, 20 is likewise controllable, namely in adaptation to the velocity of the conveyor belt 17.
  • the thickness, i.e. the spacing between the chain belts 19, 20, is likewise adjustable. Cooling is effected through the interspaces of the chain belts, for example with water sprays from spray pipe 30 arranged above, and beneath the sheet and can be recovered in a bottom trough, not shown.
  • air-jet nozzles 31 are preferably arranged, whereby on the one hand the sheet is dried and additionally further cooled, e.g. at 40° to 60° C. at the surfaces of the sheet.
  • the finished sheeting is trimmed along the edges with a cutter 22 in the longitudinal extension and is optionally divided and thereafter cut to size by means of a transverse sawing means 23. After the cutting step, the cut-off panels slide away from the sheeting over the table 24 and are taken off therefrom.
  • the arrangement of the sizing zone and the conveyor belts 5, 6 in superimposed, tier-like fashion as shown in the embodiment of the FIGURE is especially space-saving. However, it is just as well possible to dispose the conveyor belts 5, 6 in one plane, and it is likewise feasible to associate even a third conveyor belt with the falling chute, if desired, for fillers or binders to be included in the final sheeting product.
US06/305,726 1980-10-01 1981-09-25 Process for the continuous production of a length of stratifield material from foam particles Expired - Fee Related US4417932A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3037011 1980-10-01
DE3037011A DE3037011C2 (de) 1980-10-01 1980-10-01 Verfahren und Vorrichtung zum kontinuierlichen Herstellen eines bahnförmigen Schichtmaterials aus Schaumstoffteilchen

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US4417932A true US4417932A (en) 1983-11-29

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EP (1) EP0048836A3 (de)
JP (1) JPS5787929A (de)
DE (1) DE3037011C2 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258085A (en) * 1989-07-13 1993-11-02 Huls Troisdorf Aktiengesellschaft Process for producing a layered material in sheet or membrane form from thermoplastic foam
US5273697A (en) * 1993-04-13 1993-12-28 Raad Eduardo A Camouflage foamed polymer with colored pattern mass and method for manufacturing the same
FR2718477A1 (fr) * 1994-04-07 1995-10-13 Greiner Sohne Gmbh Ca Elément de construction à plusieurs couches, procédé de fabrication de celui-ci et dispositif pour la mise en Óoeuvre du procédé .
WO1998052730A1 (en) * 1997-05-20 1998-11-26 Genpak, L.L.C. Method of recycling polyester foam
US5968430A (en) * 1996-12-24 1999-10-19 Jsp Corporation Process for producing an expansion-molded article
US6537054B2 (en) 2000-01-21 2003-03-25 Jsp Corporation Apparatus for producing expansion-molded article
US20070252301A1 (en) * 2006-04-26 2007-11-01 Fred Svirklys Process and Apparatus for Continuous Production of Foam Sheets
EP2366532A1 (de) * 2010-03-19 2011-09-21 Ignucell AB Vorrichtung und Verfahren zur Herstellung von Isolier- und Drainageplatten
US9410026B1 (en) 2009-05-22 2016-08-09 Columbia Insurance Company Rebond polyurethane foam comprising reclaimed carpet material and methods for the manufacture of same
US9724852B1 (en) 2009-05-22 2017-08-08 Columbia Insurance Company High density composites comprising reclaimed carpet material

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DE4319626C2 (de) * 1993-06-15 1996-07-11 Ch Baur Formschaumtechnik Gmbh Verfahren und Vorrichtung zum Recycling von thermoplastischen Schäumen
DE4320636C2 (de) * 1993-06-22 1999-12-02 Magna Interior Systems Gmbh Verkleidungsteil
AT402640B (de) * 1994-08-10 1997-07-25 Greiner & Soehne C A Verfahren und vorrichtung zur herstellung eines verfahren und vorrichtung zur herstellung eines formteils sowie formteil aus kunststoffschaum formteils sowie formteil aus kunststoffschaum
DE19544451C2 (de) * 1995-11-29 2002-10-02 Basf Ag Sandwichplatten
WO2016016806A1 (en) * 2014-08-01 2016-02-04 Euronewpack S.R.L. Method for making a product by recycling polyethylene foam, system for making said product and product obtained therewith.

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US3986918A (en) * 1972-08-28 1976-10-19 Erling Berner Apparatus for forming laminated molded bodies
US3992501A (en) * 1973-06-20 1976-11-16 Basf Aktiengesellschaft Process for the manufacture of void-free polyolefin foam moldings

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FR2400423A1 (fr) * 1977-08-15 1979-03-16 Asahi Dow Ltd Matiere en particules expansees en resine de polyolefine
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US2987102A (en) * 1957-12-31 1961-06-06 Congoleum Nairn Inc Decorative plastic surface covering and process therefor
US3488411A (en) * 1966-04-20 1970-01-06 Alumacraft Marine Products Cor Production of low density thin gauge plastic articles
US3746107A (en) * 1971-10-29 1973-07-17 Dresser Ind Hopper for an earth boring machine
US3986918A (en) * 1972-08-28 1976-10-19 Erling Berner Apparatus for forming laminated molded bodies
US3992501A (en) * 1973-06-20 1976-11-16 Basf Aktiengesellschaft Process for the manufacture of void-free polyolefin foam moldings

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258085A (en) * 1989-07-13 1993-11-02 Huls Troisdorf Aktiengesellschaft Process for producing a layered material in sheet or membrane form from thermoplastic foam
US5273697A (en) * 1993-04-13 1993-12-28 Raad Eduardo A Camouflage foamed polymer with colored pattern mass and method for manufacturing the same
US5350776A (en) * 1993-04-13 1994-09-27 Raad Eduardo A Camouflage foamed polymer with colored pattern mass
FR2718477A1 (fr) * 1994-04-07 1995-10-13 Greiner Sohne Gmbh Ca Elément de construction à plusieurs couches, procédé de fabrication de celui-ci et dispositif pour la mise en Óoeuvre du procédé .
NL1000030C2 (nl) * 1994-04-07 1996-10-16 Greiner & Soehne C A Meerlaags constructie-element.
BE1009396A5 (fr) * 1994-04-07 1997-03-04 Greiner & Soehne C A Element de construction a plusieurs couches, procede de fabrication de celui-ci et dispositif pour la mise en oeuvre du procede.
US5968430A (en) * 1996-12-24 1999-10-19 Jsp Corporation Process for producing an expansion-molded article
US6130261A (en) * 1997-05-20 2000-10-10 Genpak, L.L.C. Method of recycling polyester foam
WO1998052730A1 (en) * 1997-05-20 1998-11-26 Genpak, L.L.C. Method of recycling polyester foam
US6537054B2 (en) 2000-01-21 2003-03-25 Jsp Corporation Apparatus for producing expansion-molded article
US20070252301A1 (en) * 2006-04-26 2007-11-01 Fred Svirklys Process and Apparatus for Continuous Production of Foam Sheets
US7767122B2 (en) 2006-04-26 2010-08-03 Fred Svirklys Process and apparatus for continuous production of foam sheets
US20100266719A1 (en) * 2006-04-26 2010-10-21 Fred Svirklys Apparatus for Continuous Production of Foam Sheets
US8162651B2 (en) 2006-04-26 2012-04-24 Fred Svirklys Apparatus for continuous production of foam sheets
US9410026B1 (en) 2009-05-22 2016-08-09 Columbia Insurance Company Rebond polyurethane foam comprising reclaimed carpet material and methods for the manufacture of same
US9724852B1 (en) 2009-05-22 2017-08-08 Columbia Insurance Company High density composites comprising reclaimed carpet material
EP2366532A1 (de) * 2010-03-19 2011-09-21 Ignucell AB Vorrichtung und Verfahren zur Herstellung von Isolier- und Drainageplatten
WO2011113957A1 (en) * 2010-03-19 2011-09-22 Ignucell Ab Apparatus and method for production of insulating and draining boards

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EP0048836A3 (de) 1982-05-19
DE3037011A1 (de) 1982-04-15
DE3037011C2 (de) 1983-12-01
EP0048836A2 (de) 1982-04-07
JPS5787929A (en) 1982-06-01

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